ANSI Flanged Ball Valve

ANSI Flanged Ball Valve (Brand: Bolaisi) is an industrial shut-off valve featuring a flanged connection and a ball as the core opening and closing element. It is mainly used for rapid on-off control and flow direction switching of fluids in industrial pipelines. The product is available in two main structural types: floating ball valve and trunnion mounted ball valve. Different materials, sealing types and actuation modes can be flexibly selected according to working conditions, making it widely suitable for various conventional industrial pipeline applications.

Core Technical Parameters

Core Structural Components

The product adopts a modular design and consists of six core modules, which can be flexibly matched according to working conditions:

● Valve Body: Available in 2-piece, 3-piece and one-piece structures, providing the main pressure-bearing and installation foundation to meet different maintenance and installation requirements.

● Ball Closure Element: A rotating ball with a coaxial through-hole, serving as the core control component for flow regulation, achieving full opening and closing through rotation.

● Sealing Assembly: Includes soft seal (PTFE) and hard seal seat types that form internal seals with the ball; matching packing ensures external sealing between the stem and valve body to prevent medium leakage.

● Valve Stem: The transmission component connecting the actuator and the ball, driving the ball to rotate 90° for opening and closing.

● Actuator: Standard configuration is manual lever; worm gear, pneumatic and electric actuators are optional for different automation control needs.

Working Principle

The valve controls full opening and closing of the pipeline by rotating the ball 90° around the stem axis:

● Fully Open: The ball bore is fully coaxial with the pipeline flow path, allowing unobstructed fluid passage with extremely low flow resistance.

● Fully Closed: The ball bore is perpendicular to the pipeline flow path, with the ball tightly fitting the seat to completely block the medium and achieve reliable sealing.

Two core sealing structures are available for different working conditions:

● Floating Ball Structure: Under medium pressure, the ball floats slightly to press against the downstream seat, achieving self-tightening sealing. Higher pressure delivers more stable sealing performance, suitable for small to medium diameters and medium-low pressure conditions.

● Trunnion Mounted Ball Structure: The ball is supported by upper and lower trunnions with no radial displacement. The seat features elastic compensation to automatically fit the ball for sealing, with low operating torque and long-term stable performance, suitable for large diameters and high-pressure conditions.

Core Product Features

● Standardized Flanged Connection: Complies strictly with American standard flange dimensions, supporting RF, FF, MFM, TG, RJ and other flange face types. It enables easy installation and removal, with high interchangeability with same-standard pipelines and equipment without on-site modification.

● Efficient & Controllable Operation: Only a 90° rotation is required for manual full opening and closing, enabling quick operation suitable for emergency shut-off. The opening angle can be precisely adjusted for flow direction switching.

● Optimized Flow Path Design: Full bore structure creates nearly no flow resistance loss in the fully open state, reducing pipeline energy consumption and adapting to high-viscosity media and media containing minor particles.

● Modular Flexible Configuration: Valve body, seals and actuators are modularly designed. The ANSI Flanged Ball Valve can be customized with materials, sealing types and actuation modes based to on-site pressure, medium and temperature requirements.

● Bi-directional Flow Compatibility: Uni-directional or bi-directional flow structures are optional without strict inlet/outlet restrictions, enhancing installation and operational flexibility.

Product Performance Advantages

● Wide Working Condition Coverage: Nominal diameter from DN15 to DN200 and nominal pressure from 150LB to 600LB cover most general industrial pipeline applications.

● High Corrosion Resistance: Multiple body material options including carbon steel, stainless steel 304, 316 and 316L resist corrosion and erosion from water, oil, steam, acids, alkalis and other media, extending service life.

● Stable & Reliable Sealing: Soft seal achieves zero-leakage performance for clean media at normal temperatures; hard seal withstands high temperatures and abrasion for steam and particle-laden media. Both types ensure long-term stable sealing to minimize internal and external leakage.

● Safe & Labor-Saving Operation: Optimized stem and lever design greatly reduces operating torque for easy manual operation. Anti-blowout stem and anti-static structures prevent static buildup from medium friction and stem ejection, meeting safety requirements in high-risk industries such as petroleum and chemical engineering.

● Convenient Maintenance: 2-piece and 3-piece body designs allow overhaul and seal replacement without pipeline disassembly, greatly reducing on-site maintenance workload and downtime.

Main Application Scenarios

With stable on-off control and broad adaptability to media and working conditions, the ANSI Flanged Ball Valve is widely used in pipeline systems across major industries:

● Oil & Gas Industry: Medium shut-off and switching in oil and gas exploration, long-distance pipelines, gathering stations and refined oil storage and transportation.

● Chemical Industry: Process control of acidic/alkaline media, organic solvents, polymers and additives under harsh chemical production conditions.

● Power Industry: Pipeline on-off control in boiler systems, steam pipelines, cooling water circulation and make-up water systems to ensure stable unit operation.

● Paper & Metallurgy Industry: Pipeline control for paper black liquor, metallurgical slurry and water circulation systems, with impact-resistant and wear-resistant structure.

● Water Treatment Industry: Pipeline opening/closing and flow regulation in municipal water supply/drainage, industrial wastewater treatment, reclaimed water reuse and circulating water systems.